What is virtual table in SQLite?

Question

A virtual table is an object that presents an SQL table interface but which is not stored in the database file, at least not directly. The virtual table mechanism is a feature of SQLite that allows SQLite to access and manipulate resources other than bits in the database file using the powerful SQL query language.

What is mean by virtual table in SQL?

In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database.

What is a virtual table called?

A virtual method table (VMT), virtual function table, virtual call table, dispatch table, vtable, or vftable is a mechanism used in a programming language to support dynamic dispatch (or run-time method binding).

Why do we need virtual table in SQL?

The virtual tables in SQL are the logical structures and entities that help us adding functionality that simplifies the complex query's resultset or part of the contents of the table to be used as a separate table that actually doesn't exist on the physical memory but resembles it in working.

Why view is called virtual table?

Virtual tables mean the tuples in views do not have physical existence and are not stored into the database. The tuples are like temporary data created as an outcome of the SQL query which typically draws filtered data from one or more base tables.

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